Improvement in lubricating compounds



UNITED STATES PATENT OFFICE.

BRIDGET FRENCH, OF ROCHESTER, NEW YORK, ASSIGNOR TO CHARLES T. HAM, JOHNB. CARSON, AND ROSWELL HART, OF SAME PLACE.

IMPROVEMENT lN LUBRIC ATING COMPOUNDS.

Specification forming part of Letters Patent No. 195,890, dated October9, 1877; application filed May 24, 1877.

To all whom it may concern:

Be it known that I, BRIDGET FRENCH, of Rochester, New York, haveinvented an Improved Lubricating Compound, of the-composition of which,and the mode of compounding the same, the following is a specification.

My invention relates to an improved lubrieating oil or OODlIJOUlld. tobe used in lubricating the journals of locomotives, cars, or othermachinery, and to the method of compounding the same.

My improved lubricating compound is composed of petroleum or other oil,plumbago, tallow, resin, tar, and Glaubers salts, in the followingproportions, which I have found to be preferable for general purposes:One gallon of petroleum, from one to six ounces of finelygroundplumbago, six ounces of resin, three ounces of tallow, one ounce of tar,and one ounce of Glaubers salts.

The quantity of solid substances combined with the oil, as here given,may be increased during the summer months, or decreased during thewinter, without injury to the resulting compound. It will also be foundthat as the quantity of the solid substances is increased the amount ofphunbago which the oil will hold in suspension will be greater. Anydesired grade of oil may, therefore, be made from these substances, whencompounded as hereinafter described.

Pitch may be substituted for the resin, in whole or in part. Alum may beused in the same proportions in place of the Glaubers salts. Epsom saltsin increased proportion answer the same purpose, but are more expensive.

In preparing my improved lubricating compound the plinnbago and saltsare boiled in the oil, in which the salts will entirely dissolve, andthe tallow, 'resin or pitch, and the tar, having been melted together,are added while hot to the boiling oil. The whole is then allowed tocool, being thoroughly agitated and incorporated together during thistime.

The tallow, resin, and tar, when melted together, form a compound whichcombines readily with the boiling oil, and imparts to it the property ofholding the phnnbago in suspension, in quantities increasing with theproportion of the solid substances used.

My improved lubricating compound, as herein described, will be found topossess lubricating qualities of the highest order, is permanently fluidat ordinary temperatures, entirely free from lumps, and retains theplumbago in suspension for an indefinite time.

I claim- The herein-described lubricating compound, composed ofpetroleum, plumbago, tallow, resin, tar, and Glaubers salts, in theproportions substantially as described.

BRIDGET FRENCH.

Witnesses:

L. A. WATSON, T. G. OUTERBRIDGE.

